/Engine/Source/Runtime/MovieScene/Public/Evaluation/MovieSceneEvaluationTrack.h
Track implementations are evaluated once per frame before any segments.
template<typename T> [TEnableIf](API\Runtime\Core\Templates\TEnableIf)< [TPointerIsConvertibleFromTo](API\Runtime\Core\Templates\TPointerIsConvertibleFromTo_1)< T, [FMovieSceneTrackImplementation](API\Runtime\MovieScene\Evaluation\FMovieSceneTrackImplementation) >::Value >::Type SetTrackImplementation ( T && InImpl )